Active Power Filter with a Common Direct Current Link

The objective of work is the development and research of circuit solutions, algorithms and a control system for a shunt active power filter to provide compensation of harmonic distortions, reactive power and to increase the electromagnetic compatibility of the non-linear consumers of electric power with the power grid. Concept of the work is to create a power structure of a shunt active power filter based on the autonomous voltage inverter with the connection of the DC link of the autonomous voltage inverter to the DC link of the AC electric drive frequency converter and to develop a control system for the shunt active power filter based on a relay current regulator with the calculation of the total required current of the shunt active power filter system – Frequency Converter - Asynchronous Motor by means of time-frequency method.